The Cocon 26 is a small underground system with a filter that resists a supply pressure up to 19 bar and a distribution pressure of 10 mbar in Gorter product range. It is especially suitable for urban use. The DVGW inspection standard VP 702 is complied with by Cocon 26. Compared to on-site facilities, Cocon 26 offers several benefits. These include reduced environmental effect, lower noise levels, avoidance of vandalism, and minimum maintenance requirements. Based on the replaceable connecting unit, site inspections and workshop maintenance with Cocon 26 are simplified. The complete connecting unit may be exchanged within 10 minutes.